In neuromuscular junction, the effect of acetylcholine (ACh) binding to receptors o nthe motor end plate lasts only briefly due to:_______ Rapid uptake of the ACh into the myofiber Endocytosis of the ACh receptor into the myofiber Rapid destruction of ACh in the synaptic cleft by acetylcholinesterse Rapid destruction of ACh in the synpatic cleft by monoamine oxidase Diffusion of the ACh out of hte synaptic cleft